Impact of SARS-CoV-2 on incidence, treatment and outcome of very preterm born infants in Switzerland: a retrospective, population-based cohort study. Swiss Med Wkly [Internet]. 2022 May 13 [cited 2025 Oct. 28];152(1920):w30174. Available from: https://www.smw.ch/index.php/smw/article/view/3195